Installing these plug caps on your scooter or underbone is a straightforward process. Simply remove the old cap, clean the area around the plug, and securely attach the new high-pressure cap. This simple upgrade can significantly improve your 's ignition system, leading to smoother starts and efficiency. Features -Color:Black -Material:Plastic -Size:9.00X2.50X2.50cm/3.54X0.98X0.98in -Enhanced safety: the high voltage cap and plug cap are designed to ensure the stability and safety of the plug, providing peace of mind while riding -Versatile accessories: this set includes high voltage caps, plug caps, and plug boots, offering a complete solution for your scooter and underbone -durable materials: made from durable materials with excellent heat resistance, these accessories are designed to last and perform under tough conditions -Simple installation: easy to install, these accessories are compatible with various brands and models, making them a practical choice for any rider -Ample supply: providing enough accessories for replacement and spare needs, ensuring you are always prepared for any situation Package list: 2 pcs x 5pcs Nut cap